mix 1 part of tea tree oil or neem oil with 4 parts of olive oil or almond oil, they act as carrier oils. Apply the oil mix onto the scalp and leave it for an hour. neem or tea tree oil help to smother the lice. now comb the lice out using the lice comb. Repeat this once a week for a month and ocassionally wash your scalp with neem water made by boiling neem leaves in water.